Soot-removing system



Feb. 18, 1930.

A. GIRTANNER ET AL.

SOOT' REMOVING SYSTEM Filed Oct. 25, 1925 awuentow Alexdl wl cvG'z'rhzune aae zk J. fir/Valle 351 /14; way/nut Patented Feb. 18, 1930UNITED S res Parser orrics ALEXANDER GIRTANNER, on NEW YORK, n. Y., Annaosnrn J. MCNULTA, or SUMMIT,

NEW JERSEY, .ASSJZGNORS TO GIRTANNEB EHGINEERING CORPORATION, YORK, N.Y., A CORPORATION OFFNEW YORK or NEW SCOT-REMOVING SYSTEM This inventionrelates to improvements in dust collecting systems and moreparticularliy to an improved-selective suction arrangement, wherebysoot, ashes andother materials in pulverized formmay be removed bysuction at different points as may be re quired, maintainingthe fullelficiency of the apparatusat all times.

'lihe primary object of this-invention is to provide novel and improvedsystemof selective control, Whereby one or another inlotto the conveyingsystemzmay beinstantly rendered operative or inoperative at Will.

Another object of our invention is to pm vide. a simple andefficientarrangement for the selective control of a plurality of inletsleading toa dust collecting system, whereby one or another-of saidinlets may be connecteditoor disconnected from the system in asimple;manner, calculated tomaintain the full efliciency of the system at alltimes by limiting the inlet area to a predetermined maximum. I

Another object of this invention is to pro.- v-idea' device-ct a simpleand improved design, particularly adapted for the removalof soot, dustand other materials in finely divided formfrom pockets and other partsof boilers along the path" of the products of combustion Where thesematerials in pulverized form are; likely to collect.-

YVith' these and other objects in viewas Will more fully appear" as thedescription proceeds, this invention also comprises certain novel andimproved constructions and arrangements of parts aswill be fullydescribed and claimed in the appended claims. The drawings specificallyillustrate an embodiment of our invention as applied for the removal ofsoot from boilers; but as stated, it is understood that the inventiveidea may be extended to' other applications of kindred nature, such asthe removal of ashes, grain-conveying, sand blast apparatus,-

- etc; a 7

It is well known that theefficiency of dust collecting systems, where 4suction is employed to collect dust and other materials in minute form'is'intiinatelyrelated to the totalamountoiL'a-otive suction area ofthevarious through the various inlets, is substantially inverselyproportional to the total area of said inlets.

For the suction action to be effective, it is necessary that a certainlow pressure be maintained at all times, especially at the points oi"inlet, and therefore there are definite limitations which are imposedupon the de-' signer when a given'install'ation is to be figured on.

When the system extends to a numberof points, each provided with itsinlet or inlets and the total area of these inlets is consid'-, erablysuperior to that permissible by the capacity of the suctionv apparatusused, it"is customary to provideeach inlet With means such as a gatevalve for closing or opening said inlet; so that only a few inlets atatime may be rendered operative in order to maintain the efficiency of:the system.

In other Words, installations of this kind are enerally not suiiici'entfor continuous operation at all points reached b'y the system but on theother hand, are suiiicient for continuous operation With alternate useof the various points of suction.

The individual control of each inlet;

meansfof valves or other appliances may often require considerableexpense. Furthermore, an arrangement of this kind may only be adoptedWith diiiiculty When the points at which theinlets are locatediare noteasily accessible or are altogether out ct i It is the main object ofour present inventime to provide just such an arrangement. of

selective control ofa plurality of inlets which" ispparti'cularlyadapted for use'in such'placeswhich are d-ifiic'ult of access or Whicharenot' within reach of the operator; said arrange-- ment beingextremely simple-and effective and comprising a single controllingmember which may be extended to a point where its operation mayconveniently be effected.

I-Iowever, on. account'of its. simplicity and relatively low cost, thearrangement may also 1 be used to advantage at any point in a dustcollecting system where a plurality of inlets leading to the sametubular element or branch of a system, are used.

Referring to the drawings,

Fig. 1 is a fragmentary cross sectlonal view in'elevation of a boilerfurnace showing an embodiment of our invention applied to the 7 lowerpart ofthe combustion chamber;

' 1 Fig. 5 is a detail side sectional view inele Fig. 2 is a' partlydiagrammatic plan view of the'suction members and-controlling meanstherefor, extendinglthrough. the I walls and through the entire lengthof the boiler;

1 Fig. ;3 is a detailplan View of one of the controlling members used;

Fi 4 is a fra 'mentar detail side sectional view in elevation of theexhaust end of the soot collecting system;

vationofone of the suction members, as ap plied inFig. 1,;in an enlargedscale; Fig. 6 is a detail side sectional view in elevation of-theoperating end of one of the said suctionmembers,as shown'in Fig. 2 in anenlarged scale; and

" Fig. 7 "is a detail end view thereof. 4 r In said'drawings 1Odesignates the; lower part of the-combustion chamber of boiler Wheredustandsoot 11, ordinarily colle'ctin enclosed and difiicult of accessand furthermore, the temperature is usually such that no work can'beperformed while the boiler is in operation, except from the outside. Thebed 12 of the combustion chamberis accordingly providedwith a pluralityof funnel. shaped outletswhich in the present instanceare' ar- Tderneath the, bed plate and in register with ranged'in two longitudinalrows 1,3, 14. ,,Un-

said two longitudinal rows of outlets, are mounted two tubularsuctionmembers 1 5,16,

provided with inlets 17, 18 arrangedin 1 2 tudinal series onsaid tubularmembers to correspond and register with. sa1d outlets as clearly shownin Figsfi2 and 5.

In so far asdescribed, the system merely corresponds to one of ordinarydesign com prising two tubular suction members each provided with aplurality of inlets which must, of 'course, be controlled in order tolimit the suction] area tothat which the capacity of thelsystem callsfor." I v '60 i The two suction members 15, 16 lead to a commoncollector 19, which is directed downwardly and then through the wall 21of and. into the ash pit 22. Suction may, of course,-

be created in any suitable manner, the obvious way.v in this case beingto. use the availablewhich inlet or steam under pressure; accordingly,'lelbow member 23 at the lower end of collector 19 is 7 shown providedwith a steam inlet 24 capable of delivering a. steam jet right acrossthe 7 lower end of collector 19,- co -axial with its side extension25,1eading-tothe ash pitfas described. Steam thus direoted under highpressure creates a suction within tube 19 as will be readily understood,causing therefore;

loose material 11 to be drawnthroughthose inlets 17, 18which happen tobe operated at 1 any onetime.

It is obvious that other means of creating suction can be used, forinstance, a fan, in any case Where it should'be preferable to do so,

sijncethe application of our in'ventionis not limited to steamboilersbut may also be eX- tended to dust collecting systems of variouskinds, as'stated. e r

1 The salient feature of our invention resides inthe method of control,of'the various inlets leading to the same suction member. As

dinal series spaced along the enti're lengt h of each suction member.Eachsuction member is'provided with a controlling member,

stated, said inlets are arrangedin longitusuch as 26 in-Fig. 3, whichismerely a tube open at its inner-end, the outside diameter; of'whichsubstantially correspondslto the inside diameter-of suction members 15,16.

Said. suction members extend from one-side of-the boiler through itswall 28 for. the

entire length of the combustionchamber andthrough the opposite wall 29jgbeingwopen at this end} Controlling-members 26,27; ,can

outwardly as .at 30 to allow for their being operated by hand.Saidcontrolling meme-f '"bers v26, 27 are provided with openings" suchas31 which are spacedalong said control- A ling members, to cor respondwith the longitudinal spacing offtinlets 17, 18, of suction.

members 15, 16, when controlling .inembers, j

26, 27 are fully inserted in their normal operative position;'Saidropenings 31, how-f ever, are not arranged 1n longitudinal ,alignmentbut are angularly s-paced in relation to each other, so that the,angular adjustment of controlling members 26, 27ijdetermines group ofinlets. is operative atany onetime. i K

In the case illustrated, notwo openings 31 of the {controlling membersare arranged in the same, longitudinal alignment and therefore',1thereis no possibilit'y ofrendering more than one of inlets 17, 18 operativeat anyone time. In other words, controlling members 26,27 collectivelyand selectively control all the inlets leading to their respec-.

tive suction members 15,.16 with'but a single control for eachcontrolling membeni,

- Tubular. controlling members 26 and 27. are inserted endwise intosuction members' 15,16, their ends 31, 32,;projectingthrough therefore,bejlongitudinally inserted into su'ction'members' 15, 1 6 andallowedjtoproject side wall 29 and the transversal alignment of openings31 to correspond with that of inlets 17, 18 is insured in any suitablemanher. A simple arrangement is illustrated in Fig. 6 where it is seenthat tubular member 26 has its projectingend 80 formed by a separatepiece of tubing, joined to member 26 by means of a bushing connection83.

The inner face 34 of said connection abuts against the face of a flange35 mounted upon the extreme end of a suction member 15 when openings 31correspond in a transverse sense to inlets 17 18. The inner tube orcontrolling member 26 is maintained in this position where it may berotated but is constrained against axial displacement by means ofanother flange 36, abutting against the outer face 37 of the bushingconnection mounted upon flange 35 by means of studs 38, of a suitablelength. This arrangement is extremely simple and inexpensive andpossesses the advantage of being adapted to be put together by usingreadily available standard fittings and parts.

Controlling members 26, 27 are operative externally of the boilerthrough their projecting ends 30 and may be rotated from time to time byangular quantities corresponding to the angular distances between theopenings 31. The positioning of the controlling members to insuresuccessive registering of their openings 31 with inlets 17, 18 may beobtained in any suitable manner, the provision of an arrangement to thisend being within the province of any ordinary mechanic. However, sincesimplicity and low cost are essential in this class of devices, weillustrate an arrangement answering both these conditions in asatisfactory manner.

This arrangement is shown in detail in Figs. 6, 7 and merely comprisesperforations such as 39, made along the circumference of projectingparts 30 of the controlling members, so that their angular distanceswlll correspond to the angular distances between openings 31. Saidopenings are preferably arranged along a spiral rather than along acircumference in order not to unduly weaken the section of tubular parts30. p

At the outer' end of each of the parts 30, is secured a cap 40providedwith a handle 41 which may be used to rotate the controllingmember attached thereto, to its various positions. A suitable stop isprovided adapted to interlock with the various openings 39 in order tomaintain the controlling member in the angular position in which ithas'been set. A convenient arrangement is illustrated where 41designates a lever provided with a handle 42, pivotally mounted upon astud43 outwardly projecting from the wall of the boiler or from flange44: mounted upon said wall. Lever 4C1 terminates in a plug 45, which isradially directed in relation to extension 30 of the controlling memberand which canenter any opening 39 which may be registering therewith,acting thus as a stop preventing angular motion of the controllingmember. a

- Member 41 may be moved outwardly around its pivot by means of handle42 to free extension 30 of the controlling member when the same is to beset in a diflerent angular position. If the openings 39 are set inspiralarrangement as shown itis necessary forstud 43 to be sufliciently longto permit axial shifting of lever 41' to the various longitudinalpositions occupied openings 30, as shown. It is thus seen that .by meansof this simple arrangement the controlling members are positioned bothin a longitudinal and an angular sense to insure correct registering ofany one of their openings 31 with their corresponding inlet 17 or 18, sothat the suction action may be shifted to any desired point within therange of suction members 15, 16, at a moments notice. The efliciency ofthe suction action is maintained at all times because the suction areais always limited to a predetermined maximum, and the difiiculty ofcontrol of the various inlets at points which cannot otherwise beconveniently reached by the operator, is at the same time removed.

Ourinvention may be carried into practice in a number of different wayswithout departing from the inventive idea, and the drawings aretherefore merely intended for illustrative purlposes and not in alimiting sense; according y, we reserve ourselves the right to designand build devices embodying our invention in any Way or manner which mayenter fairly into the scope of the appended claims.

l/Ve claim:

1. The combination with a boiler furnace 7 having an ash pit and a dustcollecting chamber of a dust collecting system, comprising a tubularsuction member mounted underneath said chamber and provided with alongitudi-' nal series of spaced openings communicating with saidchamber, an extension from said suction member leading to said ash plt,means for creating suction within said suction member and fordischarging the dust drawntherethrough within said hopper, a rotatabletubu- I lar controlling member inserted into said suction member,provided with openings adapted to selectively register with the Openingsof said suction member by rotation of said conrolling member, means forlongitudinally positioning said controlling member, means for operatingthe same and means for retaining it in its various angular positions. 7

2. In a dust collecting system, an open end tubular suction memberprovided with a longitudinal series of spaced openings, a rotata- 4 I Yo 1,747,435

said controlling member, a collar on said eon= trolling member abutting:againstthe end of saidsuction'member; and a flange associated 'withsaid suction member abutting against the outer surface ofsaid collabpreventing axialdisplacement of said controlling member -anOPeI-atingmember mounted upon the projecting end of-said controlling member,

and means cooperating with said controlling qo member'for retaining saidcontrolling memv 7 her in-rany one of its operative angular posit-ions;I e e t t ALEX GIRTANNER.

J. J MGNULTA.

